#VU98022 Use of Uninitialized Variable in golang (Red Hat package) - CVE-2024-9355

Vulnerability identifier: #VU98022

Vulnerability risk: Medium

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2024-9355

CWE-ID: CWE-457

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
golang (Red Hat package)
Operating systems & Components / Operating system package or component

Vendor: Red Hat Inc.

Description

The vulnerability allows a remote attacker to weaken TLS encryption.

The vulnerability exists due to an uninitialized buffer length variable in the CGO bindings that intermittently return a zeroed buffer from (*boringHMAC).Sum() in FIPS mode. A remote attacker can randomly cause an uninitialized buffer length variable with a zeroed buffer to be returned in FIPS mode and weaken TLS security.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

golang (Red Hat package): before 1.21.13-4.el9_4

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External links
https://bugzilla.redhat.com/show_bug.cgi?id=2315719

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.